The DU Speed Booster application has a variety of features to optimize the performance of an Android device. Depending on the particular needs of the device, users can delete unused files, free up RAM, uninstall old applications, perform a speed test, and much more. There's even an antivirus engine that scans the phone for potential issues.

The application is incredibly useful for Android users. It has an intuitive user interface that makes navigation easy. The many functions are clearly displayed and explained, making it very user-friendly to the average user.